Look guys, it's art. It's just not art that's demonstrative of technical skill, which is what most people identify as art. Also, it's kind of lame, and the shoeprints should really be left in instead of fixed at this guy's expense. Every element of an installation is supposed to be carefully considered, especially placement. If this artist wanted to put a crapton of peanut butter on the floor without a fence, he needed to be aware that someone might step in it and be prepared for the eventuality.